

export function createBase64() {
  "use strict";
  var version = "2.1.9";
  // if node.js, we use Buffer
  var buffer;
  if (typeof module !== "undefined" && module.exports) {
    try {
      buffer = require("buffer").Buffer;
    } catch (err) {}
  }
  // constants
  var b64chars =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var b64tab = (function(bin) {
    var t = {};
    for (var i = 0, l = bin.length; i < l; i++) t[bin.charAt(i)] = i;
    return t;
  })(b64chars);
  var fromCharCode = String.fromCharCode;
  // encoder stuff
  var cb_utob = function(c) {
    if (c.length < 2) {
      var cc = c.charCodeAt(0);
      return cc < 0x80
        ? c
        : cc < 0x800
        ? fromCharCode(0xc0 | (cc >>> 6)) + fromCharCode(0x80 | (cc & 0x3f))
        : fromCharCode(0xe0 | ((cc >>> 12) & 0x0f)) +
          fromCharCode(0x80 | ((cc >>> 6) & 0x3f)) +
          fromCharCode(0x80 | (cc & 0x3f));
    } else {
      var cc =
        0x10000 +
        (c.charCodeAt(0) - 0xd800) * 0x400 +
        (c.charCodeAt(1) - 0xdc00);
      return (
        fromCharCode(0xf0 | ((cc >>> 18) & 0x07)) +
        fromCharCode(0x80 | ((cc >>> 12) & 0x3f)) +
        fromCharCode(0x80 | ((cc >>> 6) & 0x3f)) +
        fromCharCode(0x80 | (cc & 0x3f))
      );
    }
  };
  var re_utob = /[\uD800-\uDBFF][\uDC00-\uDFFFF]|[^\x00-\x7F]/g;
  var utob = function(u) {
    return u.replace(re_utob, cb_utob);
  };
  var cb_encode = function(ccc) {
    var padlen = [0, 2, 1][ccc.length % 3],
      ord =
        (ccc.charCodeAt(0) << 16) |
        ((ccc.length > 1 ? ccc.charCodeAt(1) : 0) << 8) |
        (ccc.length > 2 ? ccc.charCodeAt(2) : 0),
      chars = [
        b64chars.charAt(ord >>> 18),
        b64chars.charAt((ord >>> 12) & 63),
        padlen >= 2 ? "=" : b64chars.charAt((ord >>> 6) & 63),
        padlen >= 1 ? "=" : b64chars.charAt(ord & 63)
      ];
    return chars.join("");
  };
  var btoa = function(b) {
    return b.replace(/[\s\S]{1,3}/g, cb_encode);
  };
  var _encode = buffer
    ? function(u) {
        return (u.constructor === buffer.constructor
          ? u
          : new buffer(u)
        ).toString("base64");
      }
    : function(u) {
        return btoa(utob(u));
      };
  var encode = function(u, urisafe) {
    return !urisafe
      ? _encode(String(u))
      : _encode(String(u))
          .replace(/[+\/]/g, function(m0) {
            return m0 == "+" ? "-" : "_";
          })
          .replace(/=/g, "");
  };
  var encodeURI = function(u) {
    return encode(u, true);
  };
  // decoder stuff
  var re_btou = new RegExp(
    [
      "[\xC0-\xDF][\x80-\xBF]",
      "[\xE0-\xEF][\x80-\xBF]{2}",
      "[\xF0-\xF7][\x80-\xBF]{3}"
    ].join("|"),
    "g"
  );
  var cb_btou = function(cccc) {
    switch (cccc.length) {
      case 4:
        var cp =
            ((0x07 & cccc.charCodeAt(0)) << 18) |
            ((0x3f & cccc.charCodeAt(1)) << 12) |
            ((0x3f & cccc.charCodeAt(2)) << 6) |
            (0x3f & cccc.charCodeAt(3)),
          offset = cp - 0x10000;
        return (
          fromCharCode((offset >>> 10) + 0xd800) +
          fromCharCode((offset & 0x3ff) + 0xdc00)
        );
      case 3:
        return fromCharCode(
          ((0x0f & cccc.charCodeAt(0)) << 12) |
            ((0x3f & cccc.charCodeAt(1)) << 6) |
            (0x3f & cccc.charCodeAt(2))
        );
      default:
        return fromCharCode(
          ((0x1f & cccc.charCodeAt(0)) << 6) | (0x3f & cccc.charCodeAt(1))
        );
    }
  };
  var btou = function(b) {
    return b.replace(re_btou, cb_btou);
  };
  var cb_decode = function(cccc) {
    var len = cccc.length,
      padlen = len % 4,
      n =
        (len > 0 ? b64tab[cccc.charAt(0)] << 18 : 0) |
        (len > 1 ? b64tab[cccc.charAt(1)] << 12 : 0) |
        (len > 2 ? b64tab[cccc.charAt(2)] << 6 : 0) |
        (len > 3 ? b64tab[cccc.charAt(3)] : 0),
      chars = [
        fromCharCode(n >>> 16),
        fromCharCode((n >>> 8) & 0xff),
        fromCharCode(n & 0xff)
      ];
    chars.length -= [0, 0, 2, 1][padlen];
    return chars.join("");
  };
  var atob = function(a) {
    return a.replace(/[\s\S]{1,4}/g, cb_decode);
  };
  var _decode = buffer
    ? function(a) {
        return (a.constructor === buffer.constructor
          ? a
          : new buffer(a, "base64")
        ).toString();
      }
    : function(a) {
        return btou(atob(a));
      };
  var decode = function(a) {
    return _decode(
      String(a)
        .replace(/[-_]/g, function(m0) {
          return m0 == "-" ? "+" : "/";
        })
        .replace(/[^A-Za-z0-9\+\/]/g, "")
    );
  };

  return {
    VERSION: version,
    atob: atob,
    btoa: btoa,
    fromBase64: decode,
    toBase64: encode,
    utob: utob,
    encode: encode,
    encodeURI: encodeURI,
    btou: btou,
    decode: decode
  };
}





export default {
	 createBase64,

}